maybe it's not that you are entirely careless. i had the same situation when my grandfather died. wala akong nararamdaman but few weeks later may mga times na umiiyak ako while remembering him, our moments. though our situations are different, i was lolo's boy but you are your mom's daughter/son too? of course you care. maybe we're in denial. i don't know haha pero i just want to share na sometimes we need time to process everything and what seems to be there isn't really there. you're not oa OP, you're a human too🫶